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[Translated]20150722 How To Fix 'The Update Information Is Outdated' In Ubuntu 14.04.md
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Translating by GOLinux!
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How To Fix “The Update Information Is Outdated” In Ubuntu 14.04
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================================================================================
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Seeing a red triangle in top panel in Ubuntu 14.04 that displays the following error?
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> The update information is outdated. This may be caused by network problems or by a repository that is no longer available. Please update manually by selecting ‘Show updates’ from indicator menu, and watching for any failing repositories.
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It looks something like this:
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Instead of red triangle, there is a pink exclamation sign because I am using one of the [best Ubuntu icon themes][1], Numix. Coming back to the error, this is a common update problem which you might see every now and then. Now you might be wondering what is causing this update error.
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### Reason for ‘update information is outdated’ error ###
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The reason is pretty explanatory in the error description itself. It reads “this may be caused by network problems or by a repository that is no longer available”. So, either you upgraded your system and some repository or PPA is no longer supported or you are facing some similar issue.
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While the error is self-explanatory, the action it suggests, “Please update manually by selecting ‘Show updates’ from the indicator menu, and watching for any failing repositories.”, doesn’t work properly. If you click on Show updates, all you’ll see is that the system is already updated.
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Weird isn’t it? How will we find out what is failing where and why?
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### Fix ‘update information is outdated’ ###
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The ‘solution’ discussed here will work for Ubuntu versions be it Ubuntu 14.04, 12.04 or 14.04. All you need to do is to open a terminal (Ctrl+Alt+T) and use the following command:
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sudo apt-get update
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Wait for the command to finish and look at the result. Quick tip to add here, you can [add notifications in terminal][2] so that you are notified as soon as a long command finishes execution. In the last few lines at the end of the command, see what kind of error your system is facing. Yes, you’ll see an error for sure.
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In my case, I saw the famous [GPG error: The following could not be verified][3] error. Apparently there is some problem with [Spotify installation in Ubuntu 15.04][4].
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It is very much possible that you might see a different error instead of the GPG error like me. In that case, I suggest you to go through this article which I wrote to [fix various common update errors in Ubuntu][5].
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I know few people, specially beginners have strong aversion to command line but if you are using Linux, you simply cannot avoid terminal. Moreover, it is not that scary a thing. Give it a try, you will feel accustomed to it soon enough.
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I hope this quick tip helped you to fix the recurring “update information is outdated” in Ubuntu. Any questions or suggestions is welcomed.
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--------------------------------------------------------------------------------
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via: http://itsfoss.com/fix-update-information-outdated-ubuntu/
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作者：[Abhishek][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://itsfoss.com/author/abhishek/
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[1]:http://itsfoss.com/best-icon-themes-ubuntu-1404/
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[2]:http://itsfoss.com/notification-terminal-command-completion-ubuntu/
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[3]:http://itsfoss.com/solve-gpg-error-signatures-verified-ubuntu/
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[4]:http://itsfoss.com/install-spotify-ubuntu-1504/
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[5]:http://itsfoss.com/fix-update-errors-ubuntu-1404/
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Ubuntu 14.04中修复“update information is outdated”错误
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看到Ubuntu 14.04的顶部面板上那个显示下面这个错误的红色三角形了吗？
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> 更新信息过时。该错误可能是由网络问题，或者某个仓库不再可用而造成的。请通过从指示器菜单中选择‘显示更新’来手动更新，然后查看是否存在有失败的仓库。
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>
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它看起来像这样：
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这里的粉红色感叹号标记就是原来的红色三角形，因为我使用了[最佳的Ubuntu图标主题][1]之一，Numix。让我们回到该错误中，这是一个常见的更新问题，你也许时不时地会碰到它。现在，你或许想知道的是，到底是什么导致了这个更新错误的出现。
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### 引起‘update information is outdated’错误的原因 ###
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导致该错误的原因在其自身的错误描述中就讲得相当明白，它告诉你“这可能是由网络问题或者某个不再可用的仓库导致的”。所以，要么是你更新了系统和某些仓库，要么是PPA不再受到支持了，或者你正面对的类似问题。
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虽然错误本身就讲得很明白，而它给出了的议操作“请通过从指示器菜单选择‘显示更新’来手动更新以查看失败的仓库”却并不能很好地解决问题。如果你点击显示更新，你所能看见的仅仅是系统已经更新。
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很奇怪，不是吗？我们怎样才能找出是什么出错了，哪里出错了，以及为什么出错呢？
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### 修复‘update information is outdated’错误 ###
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这里讨论的‘解决方案’可能对Ubuntu的这些版本有用：Ubuntu 14.04,12.04或14.04。你所要做的仅仅是打开终端（Ctrl+Alt+T），然后使用下面的命令：
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sudo apt-get update
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等待命令结束，然后查看其结果。这里插个快速提示，你可以[在终端中添加通知][2]，这样当一个耗时很长的命令结束执行时就会通知你。在该命令的最后几行中，可以看到你的系统正面临什么样的错误。是的，你肯定会看到一个错误。
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在我这里，我看到了有名的[GPG error: The following could not be verified][3]错误。很明显，[在Ubuntu 15.04中安装声破天][4]有点问题。
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很可能你看到的不是像我一样的GPG错误，那样的话，我建议你读一读我写的这篇文章[修复Ubuntu中的各种常见更新错误][5]。
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我知道有不少人，尤其是初学者，很是讨厌命令行，但是如果你正在使用Linux，你就无可避免会使用到终端。此外，那东西并没你想象的那么可怕。试试吧，你会很快上手的。
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我希望这个快速提示对于你修复Ubuntu中的“update information is outdated”错误有帮助。如果你有任何问题或建议，请不吝提出，我们将无任欢迎。
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--------------------------------------------------------------------------------
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via: http://itsfoss.com/fix-update-information-outdated-ubuntu/
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作者：[Abhishek][a]
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译者：[GOLinux](https://github.com/GOLinux)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://itsfoss.com/author/abhishek/
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[1]:http://itsfoss.com/best-icon-themes-ubuntu-1404/
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[2]:http://itsfoss.com/notification-terminal-command-completion-ubuntu/
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[3]:http://itsfoss.com/solve-gpg-error-signatures-verified-ubuntu/
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[4]:http://itsfoss.com/install-spotify-ubuntu-1504/
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[5]:http://itsfoss.com/fix-update-errors-ubuntu-1404/
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